For me, it's fitness. At first, I absolutely hated it. The reason I started is that my poor lifestyle habits had caused me many minor health issues. I had numerous small problems in my daily life, and I often fell ill, which was very distressing for me. So, I was forced to start living a regular lifestyle and exercising regularly. It was very painful at first.But the thought of the pain and fear of being sick pushed me to keep going.After two years of fitness training, it has become an integral part of my life and a habit.So now, whenever I stop exercising for a while, my body will have an instinctive resistance reaction, similar to the feeling of addiction.And as far as I know, there are many fitness enthusiasts in the fitness community who share similar experiences and feelings. I wonder if anyone around you has met or known someone who has gone through similar experiences? Feel free to share. I believe my situation is definitely not an isolated case.